Arsenal winger Bukayo Saka has reacted to the Gunners’ unacceptable defeat to Newcastle United. On a day when Mikel Arteta’s side had to win, Arsenal put on an incredibly lacklustre display at St James’ Park. The visitors were unable to bounce back from Alexander Isak’s 12th minute goal, seeing their run without a Premier League win extend to three matches. Arsenal’s current form is not at the level expected for title challengers, giving Arteta and his players a lot to discuss on the long trip back to the capital. READ MORE: Five things we learned as Arsenal suffer damaging 1-0 defeat vs Newca…